Remote control system



Aug. 23, 1949.

Filed 00%.. 50, 1947 H16 Hg 254.5

J. G. KARLET ET AL 2,479,686

REMOTE CONTROL SYS TEM 3 Sheets-Sheet l INVENTORS Jfwegafi Geo; Kaflle and yam Walker? mm ATTORNEY Aug. 23, 1949. J. G. KARLET ET AL.

REMOTE CONTROL SYSTEM 3 Sheets-Sheet 3 Filed Oct. 50, 1947 B 2 R Z W mm m W MM m w w 0 ym W& wi

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of the omce apparatus comprising Figs. 1 to of the patent. Fig; 3 of the accompanying drawings shows typical circuits for a set 01' indication lamps associated with the switch and signal levers SW and SG of the operators control panel or located in a track diagram comprising a miniature replica of Fig. 1, as controlled by the indication relays of Fig. 2. Figs. 4A and 4B, taken together, illustrate the apparatus at a typical field station as modified to govern the transmission of the code elements by the various wayside devices for controlling the indication relays of Fig. 2, these circuits being arranged to replace the transmission control circuits shown in the lower portions of Figs. 7 and 8 of the patent, in the system illustrated therein by Figs. 6 to 9, inclusive.

Similar reference characters refer to similar parts in each of the views, and the reference characters correspond generally to those of the patent.

Referring to Fig. 1 of the accompanying drawings, it Will be seen that the track layout chosen to illustrate our invention includes seven track sections designated IT to IT, inclusive. Each of these sections has a correspondingly numbered track relay TR shown herein in Fig. 4A or 4B which it is to be understood is included in a closed track circuit like relay lTR in Fig. 9 of the patent. Each relay TR governs the transmission of a code element for controlling a correspondingly numbered track indication relay TK in Fig. 2 of the attached drawings by which the condition of occupancy of the track section is indicated and which replaces the relay 9K or IIK shown in Fig. 5 of the patent.

The four crossover tracks in Fig. 1 are equipped with the usual power switch machines identified by the numbers I, 3, 5, and 1, respectively, with a suffix A or B. It will be understood that these are conventionally arranged and that the two switches of each crossover jointly control the correspondingly numbered normal and reverse repeating relays NWP and RWP of Fig. 4A or 4B in the manner illustrated by the repeating relay RWP or by the correspondence relays NKR and RKR of Fig. 9 of the patent. Each switch repeating relay governs the transmission of a code element for controlling the corresponding switch indication relay NWK or RWK in the attached Fig. 1, which relays replace the relays [3K and 15K shown in Fig. 5 of the patent.

Train movements into the track layout of Fig. 1 are governed by three pairs of opposing signals identified as shown by the numbers 2, 4, and 6 with the sufiix R or L. It is to be understood that each signal or group of signals controls a correspondingly numbered signal indication relay LGP or RGP as shown in Fig. 9 of the patent. These relays, shown in the accompanying Fig. 4A, govern the transmission of code elements for controlling the signal relays LHK and RHK of Fig. 1; whereas, in the patent three code steps are employed for indicating signal conditions herein one of these is eliminated by interconnecting the signal lamp circuits as shown in the accompanying Fig. 3.

It is to be understood that'the code register relays 09 to M6, inclusive, in Fig. 2. are governed like the similarly designated relays shown in Fig. 1 of the patent, and that the selector relay .2348 corresponds to any one of the relays 2348 618s shown in Fig. 2, 3 or 4 of the patent. but that the single delivery relay D which each selector relay controls in the system of the patent is replaced in accordance with our invention by a series of delivery relays ID to 6D, inclusive. Where in the patent, a group of seven indication relays selected by an S relay are operated in accordance with the condition of the register relays us to EH5, following the operation 01' relays (H6 and D at the end of each code herein, a particular delivery relay of the series iD to 6D is selected for operation by relay H i ii jointly by relay S and by the first one of the register relays G9 to M5 to be operated, and thus the selected delivery relay operates a sub-group of from one to six indication relays in accordance with the condition of those register relays, the operation of which follows that of the one by which such delivery relay is operated. Thus the total number of devices the condition of which may be indicated simultaneously by any code varies from one to six, but the total number of different devices the condition of which may be indicated by a single coding unit, by the transmission of successive codes, is twenty-one instead of seven as heretofore.

Referring now to Figs. 4A and 4B, which show the corresponding field station transmitting apparatus, it is to be understood that relay M is the master relay of Fig. 6 of the patent which governs the transmission of indication codes as described therein, that relay S, Fig. 4B, is the station selector relay shown in Fig. 7 of the patent, and that relays 9 to I6 are register relays which operate in unison with the ofilce register relays G9 to il l 6 on correspondingly numbered long steps of each transmitted code. Relays 9 to I2 are controlled as shown in Fig. 6 of the patent, and it is to be understood thatrelay l3 as well as the additional relays l4 and 15 not shown in the patent are controlled similarly, but on steps Hi to i5 of each code. Each of the six sub-groups of from one to six indicating relays shown in Figs. 4A or 4B is provided with an individual starting relay IST to 6ST, respectively, which replace the single starting relay ST'of the station unit shown in Fig. 7 of the patent, and each sub-group has a control relay, IMSP to BMSP, which is selected for operation by the associated starting relay. The relays MSP are operated only one at a time by relays M and S and each serves to govern the character of a difierent one of the steps 9l5 of a transmitted code in such a manner as to select the corresponding one of theseries of delivery relays lD-BD associated with the corresponding office selected relay such as relay 234s. Each relay MSP also governs the transmission of the code elements which reflect the condition of the indicating relays of its group like the relay MSP shown in Fig. 7 of the patent.

Each sub-group at the station also has a series of valve relays V and a Valve control relay V0 for operating the relays V' in accordance with the conditionof the relays H) to I5 in response to the operation of relay It at the end of the code. These relays V and VC function to open the starting circuit when a code initiated in response to a change in condition of one or more of the indicating relays is fully transmitted, like the similarly designated relays in Fig. 7 of the patent.

Considering now the mode of operation of the apparatus of our invention under different assumed conditions, it will be assumed first that a train approachingsignal 4R enters section GT in Fig. 1 releasing the track relay BTR in Fig. 4B. Relay BTR completes a circuit from one terminal B of the local sourceof current over its contactf icofi lay234S thi6u'gh relay 5D to taffiniiial C. Relay 5D pik sfupi aiid since relay QM is'rele'ased} wire 114 is not erier'gized, and ay S'IfK is relea'sedfby rlay 5D,if er1ergized. Relay BTK'is pi ked ucover'wire ll-ib'y the" clcsms or frontcontact cofirelay 5D and held energized by it's stick circuit after may 5D'is released at tliend of the code, thereby indicating thefo'cc'ii can y; of section ET by the fighting or a suitable lampTKEiFig. 3. g lt will nextxbe ass'um'edthat a code is initiated we change in the conditioner orieof the indi eating re ays whichcbntrols relay 1ST,- Fig 1 5415. this" caserelay l MP becomes energized V and thef' 'closirigof its contact a; connects terminal 3 towirefiflito prolong the ninth step of the trans- T thence over back'cor'ita d frelay ST, fiiittedcode andthreb'y energ'irferelays 9and09. front contact r1 61relaySSTthrougE-i'eIayEMSP Qfifih ixtfi 1 6" D; is l lfi w n h i v gizedover-wirellfi', front contact d of relay as Reia arisen-meters" bi e s in: bushes; at andjfronti-coiitact gof relay 234s and relay ID astick circuita t its fro co governs thesii'r indication relays of its group in' accordance with the positions of the relays. Hill tollli; 7 It" will be seen that each indication relay iii Fig.2 is'governedby ja combination of code impulses. Relays lTK 'and ZTK, for eiiample, are controlled in accordance with the character of the'tenthand eleventh steps of onlythose codes N whichhave a lo'ngninth step whilejrelaytTK is controlled in accordancewith the character of thejeleventh step'yofjonly those codes in which the ninth stepis shortan'd the tenth step is long. From the typical examples given in the fore-" goingdescription, it is believed that the operation of the apparatus will be clearlyunderstood, and" that it will be readily apparent that each coding unit of the remote control system may be readil'y' modified in accordance with our invention so' becomes energized because wire 55 is connected to U as to be: rendered capable of controlling or in-j terminal B ov'efbacl :'coiit'actdiofrelay BTR and dic'a'ting the condition of a materially larger frontcontact g of relay ESMSP. Relay 16; Fig. number of devices by the provision of a rela- 4A, operates in the usual manner on the final; tively'sfriall number of additional relays, resultstep of the code and by connecting terminal B in a marked economy in the amount of ape to wire at its contact c energizes relay 5V0 paratus required; particularly in the case or 'Ifhe closing of pores; M plates a cir'c iit over wire a s for picks up to initiate the trans cation code, on" the 'f tio'ni selector reiav' scribed iri the eaten by established pram; b f re -5 f terminal B ati nt contac over from; cdntact'c of rel s, a tact?" or each of thereiays over fror'it contact h of relaySMSP. larger installations.

Terminal B at contact c of relay"l5 is new con- Although we have herein shown and described ri'eted to wire 11, so that relay 55V picks'up in onlyone' form of apparatus embodying our inresponse to'the closing of from contact go'f reveh'tioii, it is understood that various changes lay 5V0, and is held energized over its stick cirand modifications may be made therein within" cuit after relay 5V0 is released at the end of the the scope of the appended claims without decode. Relay 5VC also releases the starting relay parting from the spirit and scope of our inven- EST, and relay V by closing its front contact 0 tion. prepares a new pick up circuit for relay EST to Having thus described our invention, what we enable a succeeding code to be initiated following claim is: the reenergization of relay 6TB. The release of 55 1. In a remote control system for controllin a all of the relays operated during the transmission plurality of indication relays each in accordance of the code referred to, except relay 55V, occurs with the condition of a different movable device, at the end of the code as described in the patent. having transmitting means for generatin differ- Considering now the mode of reception at the cut codes, each comprising a series of code elecontrol ofii-ce of the code just described, it will be ments of a first or second character, said eleunderstood that a selector relay 2348, Fig. 2, ments being transmitted one at a time so that which identifies the transmitting station, is opereach element is identified by the number of eleated along with the selector relay S at that staments which precedes it, said system having tion, and that the positions assumed by the oflice receiving means includ ng a series of reg1ster register relays Bil-(H5 is the same as that of the relays each identified with a difierent code elerelays 9--l 5 at the transmitting station. In this ment of said series with means for operating each particular code, therefore, relays Bil-[H2 and 0 l4 register relay upon the reception of the code eleremain released, but relays I113 and M5 become enment with which such relay is identified provided ergized upon the reception :of the corresponding it is of said second character, said system also code elements so that, when relay 1H6 becomes having a SBIIBS of starting relays for in tiating energized on the final delivery step of the code, the operation of said transm tting means, includwire H8 is connected to terminal B at its coning one for each of a plurality of groups of said tact c as described in the patent, and a circuit movable devices, each starting relay b emg operis completed from wire H8 over back contacts (I ated in response to change 1n cond1t1on of any of relays (IS-M2, front contact at of relay M3, 76 movable device in its group, said starting relays being arranged to govern the transmission ot codes one at a time when a plurality of such relays are operated, the combination with the foregoing of means controlled by each operated starting relay which is governing the transmis-Q sion of a series of code elements for imparting said second character to a different one of the code elements of said series whereby the group of movable devices with which such starting relay is associated is identified by the number of elements of said first character which precede the element of said second character, meanscon trolled by such starting relayfor enabling the movable devices of its group to govern the character of each of thesucceeding elements of said series even though such elements are adapted to identify other groups of devices in codes gov erned by other starting relays, and meansrgov erned by the first of said series of register relays to be operated by a code element of said second character for selecting a particular group of said indication relays for operation in accordance with the condition of the register relays identified with the succeeding elements of said series;

2. In a remote control system having trans-- mitting means for generating a code comprising two groups of code elements and also having a receiver responsive to saidcode containing a selector relay which is energized in response to a distinctive code pattern of the elements in the first group in a received code; a plurality of delivery relays, a group of stick relays for each cordance with the code pattern of one or more of the code elements of the second group in'a received code, and means controlled by the energized delivery relay for selecting the stick relays of the corresponding group for operation in ac-f cordance with the character of the remaining code elements in said second group of elements,

eventhough one or more of such elements are' adapted to govern other delivery relays in response to codes having different code patterns.

3. In a remote control system havin transmitting means for generating a code comprising two groups of code elements and also having a 8 receiver responsive to said code: in which a selector relay is energized in responseto' a distinctive code pattern of the elements in the 'first group ine received code} a plurality of'delivery relays controllediby said selecto'r relay, a plurality of indication relays controlled by each delivery relay, means for selecting each delivery relay for operation in accordance with the character of a difierent. element in the second group of elements in areceived code, means effective at the end of such code for energizing the delivery relay correspond ing to a particular element in said second group only if no delivery relay corresponding to a preceding elementhas been selected, and means controlled 1 by the energized delivery relay for operating the indicationvrelays of its group in accordancewith thecharacter of the succeeding code elementsin said second group.

4. In a remote control system having transmitting means for generating a code comprising a group of elements, each of which is of a first or a-second character, and also having areceiver responsive to said code including a plurality of delivery relays, one for each of a plurality of the code elements, in said group, means for selecting. each deliveryrelay for operation at the end of the code when the corresponding code element is o fflsaid second character and each preced ing code element in said groupis of .said first character,- a plurality .of groups of indication relays including one for each delivery relay, and means for operating the indication relays of the group identified by the operated delivery relay each-inaccordance with the characterof a different one of the codev elements which follow the one; by which such delivery relay is selected.

. JOSEPH GEORGE KARLET.

AI -VAN. GRAYSON WALKER.

, REFEBENCES CITED I UNITED 'sT 'rEs PATENTS, Number Name Date 1,817,439 Hummel Aug. 4, 1931 2,273,383 Snavely- Feb. 17, 1942 2,411,375 Jackel Nov. 19, 1946 

